发明授权
US3890314A Process for producing 7-acylamino-3-methyl-3-cephem-4-carboxylic acids
失效
生产7-亚氨基-3-甲基-3-甲基-4-羧酸的方法
- 专利标题: Process for producing 7-acylamino-3-methyl-3-cephem-4-carboxylic acids
- 专利标题(中): 生产7-亚氨基-3-甲基-3-甲基-4-羧酸的方法
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申请号: US38635573申请日: 1973-08-07
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公开(公告)号: US3890314A公开(公告)日: 1975-06-17
- 发明人: ISHIMARU TOSHIYASU , KODAMA YUTAKA
- 申请人: TOYAMA CHEMICAL CO LTD
- 专利权人: Toyama Chemical Co Ltd
- 当前专利权人: Toyama Chemical Co Ltd
- 优先权: JP8781672 1972-09-01
- 主分类号: B01J31/00
- IPC分类号: B01J31/00 ; C07B61/00 ; C07D501/10 ; C07D501/20 ; C07D501/22 ; C07D99/24
摘要:
A 7-Acylamino-3-methyl-3-cephem-4-carboxylic acid is prepared by first forming a 7-acylamino-3-methyl-3-cephem-4-carboxylic acid ester by heating a 6-acyl-aminopenicillanic acid ester S-oxide in the presence of a catalyst consisting of an acid and a sulfide and then deesterifying the intermediate 7-acylamino-3-methyl-3cephem-4-carboxylic acid ester.
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